Crosshairs on Treecorder block selection misaligned

[dboyer]

On smaller screens, the crosshairs fall behind the help text or are not centered on the map.

[dboyer]

[jwalgran]

I think this is the source of the regression

e77f3ab#diff-2d673cf24021cc99e1c1a29e34d437deR25

If I revert the media query back to what it was

@media (max-width: $screen-sm) {
    bottom: 20rem;
}

The crosshairs start working again because the map div shrinks properly.

[designmatty]

@jwalgran you're totally right. Adding that 20rem back in will fix this.

[maurizi]

@designmatty I believe adding it back in will break something else on the treecorder screen. I can stop by and show you.

[designmatty]

@maurizi I'll work on it tomorrow so we can chat about it then